Home // International Journal On Advances in Networks and Services, volume 15, numbers 1 and 2, 2022 // View article

Licensed Millimeter-Wave Spectrum Allocation and Reuse in Indoor Environments

Authors:
Rony Kumer Saha

Keywords: 6G; 28 GHz; countrywide; millimeter-wave; mobile network; spectrum allocation; spectrum reuse; indoor; small cell

Abstract:
In this paper, by exploiting the frequency domain, we propose a Countrywide Millimeter-Wave (mmWave) Spectrum Allocation and Reuse (CoMSAR) technique that allocates and reuses spatially the countrywide 28 GHz spectrum to each Mobile Network Operator (MNO) of a country to operate its small cells per floor in a building. An interference management scheme is developed to avoid Co-Channel Interference (CCI) in each apartment. We model user statistics per small cell and interferer statistics per apartment and formulate the optimal amount of spectrum for each MNO. We derive average capacity, Spectral Efficiency (SE), Energy Efficiency (EE), and Cost Efficiency (CE) for the proposed technique and the traditional Static Licensed Spectrum Allocation (SLSA) technique allocating an equal amount of spectrum to each MNO. By varying CCI and spectrum reuse, extensive numerical and simulation results and analyses are carried out for a country consisting of four MNOs, i.e., MNOs 1, 2, 3, and 4 with a subscriber base of, respectively, 40%, 30%, 20%, and 10% of the countrywide subscribers. It is shown that CoMSAR with no CCI provides 2.5 times higher average capacity, SE, EE, and CE than that with the maximum CCI. However, with regard to SLSA, it improves the average capacity, SE, EE, and CE of MNO 1 by 300%, 165%, 75%, and 60%, respectively, with no CCI, each of which decreases to the minimum value when CCI is the maximum. Further, we show that CoMSAR can satisfy SE and EE requirements for sixth-generation (6G) mobile systems by reusing the countrywide 28 GHz spectrum to small cells of MNO 1 of about 61.2% less number of single-floor buildings with no CCI, whereas 6.4% less number of single-floor buildings with the maximum CCI, than that required by SLSA. Finally, we discuss the benefits and point out key issues of CoMSAR for further studies.

Pages: 1 to 17

Copyright: Copyright (c) to authors, 2022. Used with permission.

Publication date: June 30, 2022

Published in: journal

ISSN: 1942-2644